Large-Scale and Highly Selective CO2 Electrocatalytic Reduction on Nickel Single-Atom Catalyst

？ A facile and scalable synthesis of Ni single-atom catalysts on low-cost carbon blacks ？ Current densities over 100 mA cm ？2 with nearly 100% selectivity for CO 2-to-CO conversion ？ A practical CO generation rate of 3.34 L hr ？1 was achieved in a 10 × 10-cm 2 unit cel